Automatically-operated jack for supporting walls of buildings



Jan. 19 1926.

- J. BONNET AUTOMATICALLY OPERATED JACK FOR SUPPORTING WALLS OF BUILDINGS Filed June 18, 1923 Patented Jan. 19, 1926.

- j UNITED sr-ie res ane 'JEAN BONNET, OIE. ST. ETIENNE, FRANCE' AUTOMATICALLY-OPERATED. moi; non SUPPORTING WALLS or BUILDINGS.

I Application filed June 18, 1923. Y Serial No; 646,238.

To azlwhomz'tmay'concern: I 7 die it known that I, JEAN BONNET, a citizen of the French Republic, residing in 'St. Etienne (Loire), France, have invented '5 an Automatically-Operated Jack for Supportin Walls of Buildings, of which the followlng is a specification.

The invention consists in an automatically operating lifting jack for compensating 10 the differences of level of building foundations due to the subsidence of the ground on which they rest. The jack is provided with an electric warning device actuating when a subsidence occurs. g The accompanying drawings show an example of an arrangement according to the invention in which:

Fig. .1 is an elevation showing a section P of a foundation wall with the jacks inposition. I j V Fi 2 is a'plan view of the jacks, the foundation wall being supposedremoved, V

Fig. 3 is a planof a portion of, a jack space is limited.

The apparatus comprises a lower socket a resting on the masonry; holes are provided in the socket which allow the passage of screws Z) on which are threaded worm wheels 0. Each screw 7) has at its upper end a part serving as a guide and'shoulder;

the shoulders are all atthesame level and act as supports to sustain the upper sockets d. A horizontal screw 6 is arranged toace tuate the toothed wheels 0. The screw 6 carries a ratchet wheel f and has at one end a hand lever g on which is secured a driving pawl h. A counterweightyl is fixed at the end of the lever 9; this counterweight is adjustable on the lever in dependence on the conditions of equilibrium due to. the load.

For restricted positions, the lever 9 can.

be replaced by a grooved pulley j. v

lelctz'04z-.The jacks are placed at intervals .Ul I

foundation wall. The upper socket d supports the part of the foundation wall under which the jack is .placed, and the position of the lever g andiof the counterweight is Such as F? 2 9.1 When Subtid' wheel 0.

showing a grooved pulley for use where the i 'onwhich the jack rests.

between the masonry and the lower part of a subsidence of the glO lnd On WhiQ the ja-ck ence V of the 1 ground occurs, the support yieldsunder the'lower socket a, the equilibrium 1s upset and the counterweight 9 will I descend, rotatlng by means of the pawl h the horizontal screw 6; the rotation of this -screw w1l1 produce rotation of the worm Y As these worm wheel's rest on bosses of the socket, their rotation will raise the screws 6 supportlng the upper platforms 7 (Z, thus automatically compensating the difference due: to the subsidence. The pawl and ratchet mechanism compensatesfor a difference in level as a result of subsidence, and

moreover, the jack as a whole-will be maintained in its supporting position and con tinue to function as desired after subsidence of the ground upon which the jack-may be," laced. v The rotation of the horizontal screw 6 can also be equally well obtained by a groovedpulle'y j secured to the" screw. A

cable with a counterweight which balances the load 1s mounted onthe pulley.

' screw supported in said socket, a gear wheel engaging wlth sa1d screw, a lever and a 85.

counterpoise weight on. said lever and means actuated by. said lever to rotate said gear wh'eel and automatically "raise said screw in case of. subsidence of the ground 2. For supporting the wall of'a building, a jack having a socket, avertically arranged screw supported in said socket, an internally threaded toothed wheel engaging with said screw, a lever and a counterpoise weight on said lever and means actuated by said: lever to rotate said internally threaded wheel and automatically raise said vscrew in case of rests,

3. For supporting the wall of a building, a ack having a socket, a vertically arranged screw supported in said socket, an internally threaded toothed wheel engaging with said screw, a lever and a counterpoise weight on said lever, a horizontally disposed screw engaging with the teeth of said wheel, a lever and a counterpoise weight on said lever, a ratchet wheel on 'said horizontal screw and a pawl on said lever engaging with 10 said ratchet wheel.

In testimony whereof I have signed my name to this specification.

JEAN BONNET. 

